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Texas Instruments TLV1861QDBVRQ1
- Part No.:
- TLV1861QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV1861QDBVRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE NANOPOWER HIG
- Quantity:
- Payment:
- Shipping:
Inventory:1,242
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Product details
Overview
TLV1861QDBVRQ1 from Texas Instruments is an automotive-grade nanopower open-drain comparator with single-channel configuration, 440 nA supply current, 1.8 V to 40 V supply range, and over-the-rail input capability up to 40 V above V−. It delivers fail-safe operation during unpowered conditions and is used in battery monitoring and voltage supervision circuits within always-on automotive subsystems.
For engineers reviewing the TLV1861QDBVRQ1 datasheet, TLV1861QDBVRQ1 pinout, TLV1861QDBVRQ1 application, or TLV1861QDBVRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), reverse-battery protection, power-on-reset behavior, and open-drain output enabling level translation across disparate voltage domains.
Technical Context
The TLV1861QDBVRQ1 implements a fail-safe input stage with ESD clamps referenced to V−, allowing inputs to operate up to 40 V above V− independent of V+. Its internal power-on reset circuit holds the output in a known state until supply voltage exceeds 1.5 V, preventing false triggering during power ramp-up or brownout.
As an open-drain device, it sinks current only and requires an external pull-up for logic-high assertion; output leakage is 0.3 pA at 0.1 V overdrive, and VOL is 1 mV at 2 µA sink current. Input offset voltage is ±0.25 mV (typ), with hysteresis of 2.8 mV (typ) and drift of 3 µV/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 440 nA per channel at 12 V - enables multi-year battery life in always-on vehicle subsystems |
| Supply Voltage Range | 1.8 V to 40 V - supports direct connection to 12 V/24 V automotive batteries including cold-crank and load-dump transients |
| Input Common-Mode Range | 0 V to 40 V above V− - allows monitoring of high-side voltages without level-shifting circuitry |
| Output Type | Open-drain - enables bidirectional level translation and wired-OR logic with external pull-up up to 40 V |
| Offset Voltage | ±0.25 mV (typ) - ensures accurate threshold detection in precision voltage-monitoring applications |
| Propagation Delay | 13 µs (typ) at 100 mV overdrive, 25 pF load - suitable for slow-to-moderate response housekeeping functions |
| Ambient Temperature Range | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and infotainment module deployment |
Pinout & Package
SOT-23-5 package (1.60 mm × 2.90 mm), surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Open-drain output | Sinks current only; requires external pull-up; supports logic-level translation up to 40 V |
| 2: V− | Negative supply terminal | Reference node for ESD clamps, input common-mode, and output low-level definition |
| 3: IN+ | Non-inverting input | High-impedance (>1 TΩ) node; accepts voltages up to 40 V above V− regardless of V+ status |
| 4: IN− | Inverting input | Same fail-safe characteristics as IN+; differential input voltage range ±42 V |
| 5: V+ | Positive supply terminal | Accepts 1.8 V to 40 V; powers internal bias and POR circuitry; not referenced for input clamping |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe inputs | Inputs remain high-impedance and functional even with V+ = 0 V, enabling robust pre-power-up sensing |
| Reverse battery protection | Withstands –40 V on supply pins - eliminates need for external series diode in battery-connected designs |
| Power-on reset (POR) | Guarantees known output state until VS > 1.5 V - prevents spurious wake-up or latch-up during startup |
| No phase reversal | Maintains correct output polarity even when inputs exceed common-mode limits - critical for fault-tolerant monitoring |
| Over-the-rail inputs | IN+ and IN− operate up to 40 V above V− independent of V+ - simplifies high-side sensing in 12 V/24 V systems |
Applications
| Telematics eCall Power Supervision | Automotive Head Unit Battery Backup |
|---|---|
|
Use Scenario: Monitoring main battery voltage to trigger emergency call activation upon drop below 9 V during vehicle shutdown. IC Role / Device Role / Timing Role: Single-channel comparator detecting undervoltage condition with hysteresis to reject noise-induced false triggers. Use Value: 440 nA quiescent current extends backup battery life by >10× versus micropower alternatives; over-the-rail inputs eliminate level-shifter components. |
Use Scenario: Supervising supercapacitor or coin-cell voltage to maintain RAM and real-time clock during ignition-off periods. IC Role / Device Role / Timing Role: Always-on voltage supervisor asserting reset or interrupt signal when backup source falls below threshold. Use Value: Fail-safe inputs allow continuous monitoring even before system power rail is established; AEC-Q100 Grade 1 ensures reliability across thermal cycles. |
| Instrument Cluster Low-Voltage Warning | OBC & Wireless Charger Housekeeping |
|
Use Scenario: Detecting alternator failure or battery discharge by comparing sensed battery voltage against regulated reference. IC Role / Device Role / Timing Role: Precision comparator with ±0.25 mV offset providing stable trip point across temperature for dashboard warning logic. Use Value: 3 µV/°C offset drift minimizes calibration burden; open-drain output interfaces directly with 3.3 V microcontroller GPIO without level shifter. |
Use Scenario: Enabling/disabling auxiliary power rails based on AC input presence and DC bus voltage stability during charging sequences. IC Role / Device Role / Timing Role: System housekeeping comparator performing voltage window checks and fault flag generation for MCU firmware. Use Value: 40 V absolute max rating withstands OBC transient surges; reverse-battery protection guards against service misconnection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1861QDRQ1 | SOP-5 package (3.91 mm × 4.90 mm); 121.6°C/W θJA vs. 168.1°C/W for SOT-23 | Higher thermal mass; better suited for higher ambient or sustained output loading | Select when board layout allows larger footprint and thermal performance outweighs size constraints |
| LM7321QMA/NOPB | Rail-to-rail input/output op-amp (not comparator); 1.2 mA IQ; no built-in hysteresis or POR | Requires external hysteresis network and power-good circuitry for comparator use | Only viable if existing design already uses op-amp-based comparators and can accommodate higher IQ and added components |
Compared with TLV1861QDRQ1, the TLV1861QDBVRQ1 offers superior board-space efficiency and lower thermal resistance per unit volume, while LM7321QMA/NOPB introduces design complexity and power penalty for equivalent functionality - making TLV1861QDBVRQ1 the optimal choice for space-constrained, ultra-low-power automotive supervision.
Availability
TLV1861QDBVRQ1 is available at Aetrix Electronics and suitable for telematics eCall, instrument cluster voltage monitoring, and OBC housekeeping functions requiring stable component supply across automotive production lifecycles.
Supply support for TLV1861QDBVRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in automotive ICs, power management, and precision analog.
The TLV1861QDBVRQ1 belongs to TI's automotive nanopower comparator family, designed specifically for reliable voltage, current, and temperature supervision in always-on, low-quiescent-power automotive subsystems.
FAQ
What is the maximum input voltage the TLV1861QDBVRQ1 can tolerate relative to V−?
The TLV1861QDBVRQ1 supports an input common-mode voltage range from 0 V to 40 V above V−, independent of V+ supply voltage. This over-the-rail capability allows direct sensing of high-side signals - such as battery voltage in a 24 V system - without external level-shifting circuitry. Absolute maximum rating is 42 V above V−, but recommended operating limit is 40 V.
Does the TLV1861QDBVRQ1 require an external pull-up resistor on its output?
Yes, the TLV1861QDBVRQ1 has an open-drain output and requires an external pull-up resistor to define the logic-high state. TI recommends limiting pull-up current to <100 µA to optimize VOL; typical values range from 10 kΩ (for 3.3 V pull-up) to 1 MΩ (for 40 V pull-up). The resistor value affects rise time and power consumption - lower resistance improves speed but increases static current.
How does the power-on reset (POR) function in the TLV1861QDBVRQ1?
The TLV1861QDBVRQ1 incorporates an internal POR circuit that holds the output in a known state (high-impedance for open-drain) until the supply voltage V+ exceeds 1.5 V. This prevents false outputs during power-up, brownout, or battery recovery events. Once VS > VPOR, the comparator begins normal operation with defined output behavior based on input differential voltage.
Can the TLV1861QDBVRQ1 operate with V+ disconnected or at 0 V?
Yes - the TLV1861QDBVRQ1 features fail-safe inputs that remain high-impedance and functional even when V+ is unpowered or below 1.5 V. Inputs tolerate voltages from –0.1 V to 40 V above V−, enabling pre-power-up monitoring (e.g., battery presence detection before system boot). However, output functionality requires V+ ≥ 1.5 V for POR release and active operation.
Is the TLV1861QDBVRQ1 pin-compatible with other members of the TLV186x-Q1 family?
Yes - the TLV1861QDBVRQ1 (SOT-23-5) shares identical pinout and function mapping with TLV1851QDBVRQ1 (push-pull variant), enabling layout reuse where output topology permits. Dual- and quad-channel variants (e.g., TLV1862-Q1, TLV1864-Q1) use different packages and pin counts and are not pin-compatible.
TLV1861QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 40V
- :
- 3.6mV @ 12V
- Voltage - Input Offset (Max):
- 250pA @ 12V
- Current - Input Bias (Max):
- 7mA @ 12V
- Current - Output (Typ):
- 1µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 45µs (Typ)
- Propagation Delay (Max):
- 5mV
- Hysteresis:
- -40°C ~ 125°C (TA)
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- SOT-23-5
TLV1861QDBVRQ1 FAQ
1.How can I place an order for TLV1861QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1861QDBVRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLV1861QDBVRQ1 reliable?
The price and inventory of TLV1861QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1861QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TLV1861QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1861QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1861QDBVRQ1?
TLV1861QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1861QDBVRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLV1861QDBVRQ1?
For technical support, including TLV1861QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1861QDBVRQ1 requirements.
6.How does Aetrix verify that TLV1861QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV1861QDBVRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLV1861QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TLV1861QDBVRQ1?
All TLV1861QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV1861QDBVRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLV1861QDBVRQ1 part is unused and in its original packaging.
Return procedure for TLV1861QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV1861QDBVRQ1 Tags
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LM2903DR
Texas Instruments
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LM339DR
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LM393DT
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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